From 4cf4044313ae5a1a349fcedd3d2472c3b6ed3fe7 Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Thu, 8 Mar 2018 11:29:14 +0100
Subject: Force 64-bit alignment for pre-allocators unless x86

---
 erts/configure.in | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'erts/configure.in')

diff --git a/erts/configure.in b/erts/configure.in
index b2435f1ac9..820247b4b8 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -2721,6 +2721,13 @@ LIBS=$saved_libs
 dnl restore CPPFLAGS
 CPPFLAGS=$saved_cppflags
 
+case $ARCH in
+     x86|amd64)
+	AC_DEFINE(ERTS_STRUCTURE_ALIGNED_ALLOC, 1, [Define if structure alignment is enough for allocators. If not defined, 64-bit alignment will be forced.]);;
+     *)
+	;;
+esac
+
 LM_SYS_IPV6
 LM_SYS_MULTICAST
 ERL_TIME_CORRECTION
-- 
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